| Paul Mundt | 959f85f | 2006-09-27 16:43:28 +0900 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/drivers/pci/ops-landisk.c |
| 3 | * |
| 4 | * PCI initialization for the I-O DATA Device, Inc. LANDISK board |
| 5 | * |
| 6 | * Copyright (C) 2006 kogiidena |
| 7 | * |
| 8 | * May be copied or modified under the terms of the GNU General Public |
| 9 | * License. See linux/COPYING for more information. |
| 10 | */ |
| Paul Mundt | 959f85f | 2006-09-27 16:43:28 +0900 | [diff] [blame] | 11 | #include <linux/kernel.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include "pci-sh4.h" |
| 17 | |
| Paul Mundt | 959f85f | 2006-09-27 16:43:28 +0900 | [diff] [blame] | 18 | int pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin) |
| 19 | { |
| 20 | /* |
| 21 | * slot0: pin1-4 = irq5,6,7,8 |
| 22 | * slot1: pin1-4 = irq6,7,8,5 |
| 23 | * slot2: pin1-4 = irq7,8,5,6 |
| 24 | * slot3: pin1-4 = irq8,5,6,7 |
| 25 | */ |
| 26 | int irq = ((slot + pin - 1) & 0x3) + 5; |
| 27 | |
| 28 | if ((slot | (pin - 1)) > 0x3) { |
| 29 | printk("PCI: Bad IRQ mapping request for slot %d pin %c\n", |
| 30 | slot, pin - 1 + 'A'); |
| 31 | return -1; |
| 32 | } |
| 33 | return irq; |
| 34 | } |